Question

How to calculate the transition energy for the pure rotational transition j?

Answer 1

Answer:

For a diatomic molecule in a  electronic state, we observe a microwave transition from J = 1 to J = 2 in the presence of an electric field. How many lines will appear in the spectrum?

The selection rules for rotational transitions in a electronic state are  and , where there are  values of  (i.e. ). The following transitions are allowed:

J = 1, MJ = +1       to       J = 2, MJ = +2, +1, 0

J = 1, MJ = 0         to       J = 2, MJ = +1, 0, -1

J = 1, MJ = -1       to       J = 2, MJ = 0, -1, -2

Answer 2

Explanation:

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